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JD 4430 AC

J

johnyquest69

Member
I have a man with A/C experience but not on JD tractors coming to help me. He told me to find out how much oil for compressor and Freon. This is a new R134 compressor on a tractor that had been prior converted to 134. Thanks for the info!
 
Same oil as a car,and 4 or 5 cans of freon,be sure to test for leaks, the cab corner
pipe is prone for leaks as well as where the hoses are crimped
 
on my 4840 I dumped the oil and refilled with PAG oil then vacuumed for several hours. Charged it with 134 going by temp/pressure .
 
Ran into numerous problems today being a man with little A/C experience. Picked up what was supposed to be 134a reman from jd but turned out to be a r12. Had a little difficulty in convincing parts man it wasn't correct. Another mechanic I spoke to said they are the same. Why the difference in part #'s was my question? R-12 said it came pre-oiled for system. What about 134? Thanks for your input!
 
They are the same just different oil in them,, I have given up on those old GM style and have been changing over to a new style from AP air, they also offer a "complete" line kit, and I mean all of them for about $650..a good deal and money well spent to make sure it all stays fixed,, leaks are the primary reason for failures on AC systems
 
Compressors are the same just dump the oil out of the r12 pump and put in 8-11oz of pag 100 and 3.2lbs of r134. Replace the dryer and expansion valve and pull a vacuum for
at least an hour. Let it set for a while and make sure it holds the vacuum.
 
Thanks for all the help! First experience with A/C and learned a lot! Ended up having to replace one of the lines up the corner and man were those connections tight in the top of the cab! Slow process and if I had it to do over I think I would go with aftermarket kit! Thought I was in a hurry! LOL!
 
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